816254589 has 4 divisors (see below), whose sum is σ = 1088339456. Its totient is φ = 544169724.

The previous prime is 816254563. The next prime is 816254591. The reversal of 816254589 is 985452618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 816254589 - 2²⁵ = 782700157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816254189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136042429 + ... + 136042434.

It is an arithmetic number, because the mean of its divisors is an integer number (272084864).

Almost surely, 2^816254589 is an apocalyptic number.

It is an amenable number.

816254589 is a deficient number, since it is larger than the sum of its proper divisors (272084867).

816254589 is a wasteful number, since it uses less digits than its factorization.

816254589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272084866.

The product of its digits is 691200, while the sum is 48.

The square root of 816254589 is about 28570.1695654751. The cubic root of 816254589 is about 934.5629188582.

The spelling of 816254589 in words is "eight hundred sixteen million, two hundred fifty-four thousand, five hundred eighty-nine".